C&T Solution RCO-3000 Series User Manual page 39

Chapter 2: Switches and Connectors
COM2_1: RS232 / RS422 / RS485 Connector
Connector Type: 9-pin D-Sub
Pin RS232 Definition
1 DCD2
2 RxD2
3 TxD2
4 DTR2
5 GND
6 DSR2
7 RTS2
8 CTS2
9 RI2
COM3_1: : RS232 / RS422 / RS485 Connector
Connector Type: 9-pin D-Sub
Pin RS232 Definition
1 DCD3
2 RxD3
3 TxD3
4 DTR3
5 GND
6 DSR3
7 RTS3
8 CTS3
9 RI3
RS422 / 485 Full
Duplex Definition
TX2-
TX2+
RX2+
RX2-
RS422 / 485 Full
Duplex Definition
TX3-
TX3+
RX3+
RX3-
RCO-3000 | User's Manual
RS485 Half Duplex
Definition
DATA2-
DATA2+
RS485 Half Duplex
Definition
DATA3-
DATA3+
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